Registry / kotlin-compiler

kotlin-compiler

library2.3.21jsnpmunverified

The official Kotlin compiler from JetBrains, version 2.3.21. Kotlin is a statically typed programming language that targets the JVM, JavaScript, Wasm, and native platforms. The compiler includes support for multiplatform projects, coroutines, and a rich standard library. Released on a frequent cadence with stable releases every few months and previews. Key differentiators include full interoperability with Java, concise syntax, and safety features like null safety and sealed classes. This package provides the command-line compiler (kotlinc) and is also used as a dependency by build tools like Gradle and Maven.

npm install kotlin-compiler

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · KOTLIN-COMPILER

kotlin-compiler

javascriptv2.3.21

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

kotlin

✓ import kotlin.*

✗ import org.jetbrains.kotlin.*

Standard library imports use the 'kotlin' root package. Use 'import kotlin.*' over 'org.jetbrains.kotlin.*' which is for internal compiler APIs.

kotlinx.coroutines

✓ import kotlinx.coroutines.*

✗ import kotlin.coroutines.*

Coroutines are in the 'kotlinx.coroutines' package, not 'kotlin.coroutines' (which is for low-level primitives).

KotlinCompile task (Gradle)

✓ tasks.withType<KotlinCompile> { kotlinOptions.jvmTarget = "1.8" }

✗ compileKotlin { kotlinOptions.jvmTarget = "1.8" }

Use typed task configuration (KotlinCompile) instead of the untyped 'compileKotlin' for better IDE support.

Shows basic compilation of a Kotlin source file to a runnable JAR using the command-line compiler.

// hello.kt fun main() { println("Hello, Kotlin!") } // Compile: kotlinc hello.kt -include-runtime -d hello.jar // Run: java -jar hello.jar

kotlinc --version

Debug

Known issues

breakingKotlin 2.0+ uses K2 compiler by default, which may cause issues with some code that relied on old compiler behavior.

fix

Enable K1 compiler via -Xuse-k1 compiler flag or update code to be compatible with K2.

affects: >=2.0.0

gotchaUsing 'kotlin' Gradle plugin version must match compiler version (e.g., Kotlin 2.3.21 plugin requires compiler 2.3.21).

fix

Ensure plugin and compiler versions are consistent. Use version catalog or ext.kotlinVersion.

affects: >=1.0

deprecatedKotlin Android Extensions plugin is deprecated in Kotlin 1.8 and removed in 2.0.

fix

Migrate to Jetpack View Binding or Compose.

affects: >=1.8.0

Errors

Common errors & fixes

error: unresolved reference: kotlinx

Missing dependency for kotlinx.coroutines or kotlinx.serialization in Gradle/Maven.

fix

Add implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3' (or similar) to build.gradle.

FAILURE: Build failed with an exception. * What went wrong: Could not set unknown property 'jvmTarget' for task ':compileKotlin' of type org.jetbrains.kotlin.gradle.tasks.KotlinCompile.

Using the deprecated compileKotlin closure without typed configuration.

fix

Use tasks.named('compileKotlin', org.jetbrains.kotlin.gradle.tasks.KotlinCompile) { kotlinOptions.jvmTarget = '1.8' }.

Upgrade

Version history

2.3.21latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/JetBrains/kotlin ↗

packagehttps://www.npmjs.com/package/kotlin-compiler ↗

homepagehttps://kotlinlang.org ↗